# \[Fx30-4G LTE-M/NB-IoT\] not working on NB-IoT **URL:** \ **Category:** FX30\ **Created:** [November 9, 2021, 4:58pm UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479 "2021-11-09T16:58:35Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![CGuyot](https://avatars.discourse-cdn.com/v4/letter/c/e56c9b/32.png) [@CGuyot](https://forum.sierrawireless.com/u/CGuyot)\ **Post date:** [November 9, 2021, 4:58pm UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479/1 "2021-11-09T16:58:35Z")
Hello, I would like to use the NB-IoT in France (Chambery Area). I have seen on the GSMA map that the NB-IoT is only provided by SFR in France, so I forced my SIM on SFR. I have forced the LTE-NB-IoT by AT commands… which should not make a difference anyway as the LTE-M is not available on SFR. ```auto root@fx30:~# microcom -s 115200 /dev/ttyAT at!selciot? Current Operating Mode: 0x4 Supported Operating Modes: LTE WB: 0x01 LTE M1: 0x02 LTE NB1: 0x04 OK ``` When my RAT selection is “LTE and GSM”, the Fx30 can register. ```auto root@fx30:~# cm radio rat LTE GSM root@fx30:~# cm radio Power: ON Current Network Operator: EMnify Current RAT: GSM network (LE_MRC_RAT_GSM) Status: Registered to a roaming network (LE_MRC_REG_ROAMING) Signal: Good signal strength (3) PS: Packet Switched Registered to a roaming network (LE_MRC_REG_ROAMING) ``` at this stage, I can connect but on 2G … I would like NB-IoT… If I leave only LTE as RAT, the Fx30 never register. ```auto root@fx30:~# cm radio rat LTE root@fx30:~# cm radio Power: ON Current Network Operator: Current RAT: Module not registered on network, RAT not available Status: Not registered but currently searching for a new operator (LE_MRC_REG_SEARCHING) Signal: No signal strength (0) PS: Packet Switched Registered to a roaming network (LE_MRC_REG_ROAMING) ``` Looking at the COPS response, it seems that NB-IoT is available for SFR. ```auto root@fx30:~# microcom -s 115200 /dev/ttyAT at+COPS? +COPS: 0 OK AAT+COPS=? +COPS: (1,"F-Bouygues Telecom","BYTEL","20820",0),(1,"F SFR","SFR","20810",0),(1,"Orange F ,"Orange","20801",0),(1,"F SFR","SFR","20810",9),,(0,1,2,3,4),(0,1,2) OK ``` Is-it that NB-IoT is not supported in my area? or am I missing a step? Best regards, Christian. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [November 10, 2021, 12:46am UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479/2 "2021-11-10T00:46:56Z")
you might also check AT!BAND? Also in my testing here, for using NBIOT network, I need to use another APN compared to normal LTE network. ---
**Author:** ![CGuyot](https://avatars.discourse-cdn.com/v4/letter/c/e56c9b/32.png) [@CGuyot](https://forum.sierrawireless.com/u/CGuyot)\ **Post date:** [November 10, 2021, 8:01am UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479/3 "2021-11-10T08:01:56Z")
Hello @jyijyi , Here is the response I obtain from the AT!BAND? command. ```auto root@fx30:~# microcom -s 115200 /dev/ttyAT at!entercnd="A710" OK AT!BAND? Index, Name, GW Band Mask L Band Mask 1 TDS Band Mask L Band Mask 2 00, All bands, 0000000000280180 000000000A0F189F 0000000000000000 0000000000000000 OK ``` I will check with my SIM provider what APN I should use. Regards, Christian. ---
**Author:** ![mlw](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/mlw/32/3706_2.png) [@mlw](https://forum.sierrawireless.com/u/mlw)\ **Post date:** [November 10, 2021, 8:10am UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479/4 "2021-11-10T08:10:13Z")
@CGuyot You will also need to explicitly make sure that you have an NB IoT SIM from SFR, consumer SIM’;s do not have the rights or the correct fields on the SIM to be able to authenticate on NB1 so the unit has probably already transparently tried to attach to the NB1 network and been rejected hence it has fallen back to 2G. Regards Matt ---
**Author:** ![cchenry](https://avatars.discourse-cdn.com/v4/letter/c/a183cd/32.png) [@cchenry](https://forum.sierrawireless.com/u/cchenry)\ **Post date:** [November 11, 2021, 4:32pm UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479/5 "2021-11-11T16:32:51Z")
Hi @CGuyot, What version of FX30 firmware are you running? You can check by: AT!FWD?ALVER R11.0.0.007 does not support NB1 well, have you tried updating to R14.1? BR, Chris ---
**Author:** ![CGuyot](https://avatars.discourse-cdn.com/v4/letter/c/e56c9b/32.png) [@CGuyot](https://forum.sierrawireless.com/u/CGuyot)\ **Post date:** [November 16, 2021, 11:11am UTC](https://forum.sierrawireless.com/t/fx30-4g-lte-m-nb-iot-not-working-on-nb-iot/25479/6 "2021-11-16T11:11:09Z")
Hello @cchenry, I was using a FW based on the R9 of the 4G system. I will re-test with a firmware based on the R14 of the 4G, and a SIM activated for NB-IoT. Regards, Christian.